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aleksandrvk [35]
3 years ago
8

How are diseases caused?

Biology
1 answer:
sweet [91]3 years ago
6 0

Answer:

Infectious diseases are caused by pathogenic microorganisms, such as bacteria, viruses, parasites or fungi; the diseases can be spread, directly or indirectly, from one person to another. Zoonotic diseases are infectious diseases of animals that can cause disease when transmitted to humans.

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